Fixed bug where disabled fields would be submitted.

lib/webrat/core/field.rb

@@ -47,10 +47,15 @@ module Webrat
     end
     
     def to_param
+      return nil if disabled?
       value = @value.to_s.gsub('&', '%26')
       param_parser.parse_query_parameters("#{name}=#{value}")
     end
 
+    def disabled?
+      @element.attributes.has_key? "disabled"
+    end
+
     def set(value)
       @value = value
     end

spec/api/clicks_button_spec.rb

@@ -154,6 +154,21 @@ describe "clicks_button" do
     @session.clicks_button
   end
   
+  it "should not send disabled field values" do
+    @session.response_body = <<-EOS
+      <form method="get" action="/login">
+        <input disabled id="user_email" name="user[email]" value="test@example.com" type="text" />
+        <input disabled id="user_gender_male" name="user[gender]" type="radio" value="M" />
+        <label for="user_gender_male">Male</label>
+        <input disabled id="user_gender_female" name="user[gender]" type="radio" value="F" checked="checked" />
+        <label for="user_gender_female">Female</label>
+        <input type="submit" />
+      </form>
+    EOS
+    @session.should_receive(:get).with("/login", {})
+    @session.clicks_button
+  end
+  
   it "should send default checked fields" do
     @session.response_body = <<-EOS
       <form method="get" action="/login">